Multiple lifting-jack.



A. H. SGHOLLE.

MULTIPLE LIFTING JACK.

APPLICATION FILED APR. 1, 1909.

Patented Feb. 15, 1910.

" ALBERT H. SCHOLLE, OF NEW YORK, N. 'Y.

MULTIPLE mrrmo-oacx.

Specification of Letters Patent.

Application filed April 1, 1909. Serial No. 487,159.

To all'whom it may concern:

Be it known that I, ALBERT H. SOHOLLE, a citizen of the United States ofAmerica, and a resident of New York,'1n the county and State of NewYork, have invented certain new and useful Improvements in MultipleLifting-Jacks, of w ich the following is .a specification.

a this way a saving of time and labor is effected. To attain thisdesirable purpose the jacks are mounted on a common frame and connectedwith each other and to the central operating device.

By simplicity in construction, partlcularly b the use of but oneoperatin device for all the jacks, the cost of production has been keptlow. Means are provided on the jacks to permit of the moving of thewhole apparatus about the ground or floor which means may be operated byone element of the operating device and it has been sought to' produce aneat and desirable article, all as will .be fully described hereinafterwith reference to the accompanying drawings, in which:

Figure 1 represents in sectional view on line 1, 1 of Fig. 2, a multiplelifting jack which embodies in desirable form the present im rovements,and Fig. 2 is a top plan View 0 same.

Similar characters of reference denote like parts in all the figures.

For various ap lications a different number of lifting jac s may becombined with one operating device. In most cases, however, a devicecomposed of four lifting jacks and one operating device is suflicient toattain the desired purpose and therefore such a device is illustrated onthe drawing.

In Figs. 1 and 2 of the drawing a multiple lifting ]3.Ck is shown whichis connected to a hydraulic operating device. Each lifting jack consistsessentially of a cylinder a, a

piston b mounted therein and having a crutch c at the top. At the bottomof the cylinder at a somewhat enlarged chamber (1 is provided having twoopenings in the same horizontal plane at a distance of 90 from 1 eachother. The lifting jacks are connected by ipes e, f, g, h which aretightly secured in t e openings of the chambers cl and form the framefor the device. For this reason the frame tpipes are braced by the tierods 2, y. The rame pipes being in communicat1on with the chamber d ofthe cylinder below the iston are accordin ly in communicat on with eachother, thus orming the cond uts for the liquid by means of which theistons of the acks are raised or lowered.

y virtue of this arrangement the pipes serve a double purpose, firstthey constitute the frame for the device and second they act as theconduit for the liquid;

The hydraulic operating device consists of a pum with the frame pipesforming the conduit for the liquld. suitably supported reser- V011 ortank I for the liquid is preferably located right above the ump. Thetank 1 1s in communication wlth the pump and the frame pipes which formthe conduit for the liquid. The pipe system is at all times filled withthe liquid. The pump, when operated by the lever m through the handlebar a, draws additional liquid from the tank Z and forces same throughthe pipes under the pistons of the jacks raising same. When it isdesired to lower the pistons the liquid must be returned into the tank Iwhich is provided at the top with an openmg 0 communicating with theatmosphere. For accomplishing this purpose a bypass cock p is interposedbetween the tubular frame and the tankwhich, when operated, 2'. 6.opened by the handle 9 allows the liquid to escape from under thepistons of the jacks into the tank whereby said pistons are lowered. Forthe urpose of moving the whole apparatus quic (1y about the ground orfloor each lifting jack is provided with a wheel 1'. For such movementthe ump handle may conveniently be employed? I claim as my invention:

1. A multiple lifting jack adapted to be operated from a common centralpoint, comrising a plurality of single jacks, a tube rame composed ofhorizontal rigid members connecting with the stationary parts of saidjacks and always'retaining its fixed position during operation, ahydraulic operating device common to all acks and in connection with thetube frame and jacks, and means in connection with the operating devicefor raising and lowering the jacks.

Patented Feb. 15, 1910.

is which is in communication communication with the jacks and eachother, a hydraulic operating device in connection with the plpe systemadapted to raise; and lower all the jacks simultaneously.

3. A multiple lifting jack adapted to be operated from a common centralpoint comprising a plurality of single jacks consisting each of acylinder and p ston, pipes rigidly secured in the lower portion of thecylinders forming the frame for the device, a. hy-

draulic operating devicein connection with the pipes acting thus as theconduit for the liquid and with the cylinders of the jacks, and'means inconnection with the operating device for raising and lowering the jackssimultaneously.

as f

4:. A multiple lifting jack adapted to be operated from a common centralpoint comprising a plurality of single jacks consisting each of acylinder and piston, pipes rigidly secured in the lower portion of thecylinders forming the frame for the device, a pump supported on theframe work, a suitably supported liquid tank in connection with the pumpand by means of same with the frame pipes acting as the conduit for theliquid and with the cylinders of the jacks and means in connection withthe pump for forcing the liquid under the pistons of the jacks andallowing same to return into the reservoir.

Signed at New York, N. Y., this 29th day of March, 1909.

ALBERT H; SCHOLLE.

Witnesses: D. Pn'rm PALMEDO, Lnnwre K. Bonn.

